Mold



W. T. BONNER.

MOLD.

APPLICATION FILED JULY 17. 1919.

' 1,396,158, Patented Nov. 8, 1921.

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MOLD.

APPLICATION FILED JULY 17, 1919. 1,396,158. Patented Nov. 8, 1921.

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MOLD. APPLICATION FILED ULY17, 1919.

Patented NOV. 8, 1921.

3 SHEETSSHEET 3- fvzven O Z/L ZZz a/m Tfiann 2 M UNITED STATES WILLIAMT. BONNER, OF TRENTON, NEN JERSEY, ASSIG-N OR 0F BROWN AND ONE-HALFTO'MAX BBQWN, TRUSTEE, OF BOSTON,

PATENT OFFICE.

ON E-HALF TO MAX MASSACHUSETTS.

MOLD.

Application filed July 17,

T 0 all whom it may concern Be it known that I, WILLIAM T. BONNER, acitizen of the United States, and resident of Trenton, county of Mercer,State of New Jersey, have invented an Improvement in Molds, of which thefollowing description, in connection with the accompanying drawings, isa specification, like characters on the drawings representing like partsin each of the several views.

This invention relates to molds for the making of rings and disks, suchas friction clutch rings of the type employed in multiple disk frictionclutches as used in automobiles and for other purposes. Heretofore ithas been usual to have a separate mold made for each size or type ofclutch ring. Furthermore only one clutch ring could be made in a singlemold at one time. This necessitates the making of a different mold forevery type or size of clutch ring to be produced. This involves a largeamount of labor and expense as will be readily seen. The principalobject of the invention is to provide a mold whereby several sizes andtypes of clutch rings may be molded therein by interchanging certainparts of said mold. A further object is to provide means for makingseveral clutch rings in a single mold by the building up of theinterchangeable parts thereof and providing a full metallic conductorfor the heat as it is applied thereto with the required pressure.

In carrying out my invention I provide top and bottom plates whichconstitute the main parts of the mold. In conjunction with these platesI employ filling rings blanking rings and center disks detachably fittedto said main plates and adapted to be conveniently interchanged toconform to the differ ent sizes and types of clutch rings. Theseinterchangeable parts may also be built up to provide a means for makingseveral clutch rings in a single mold at one time. The foregoing andother objects and advantages of the invention will more fully appearfrom the following detailed description, and the distinctive features ofnovelty will be pointed out in the appended claims.

Referring to the drawings:

Figure l is a. plan view of a mold con- Specification of Letters Patent.

Patented Nov. 8, 1921. 1919. Serial No. 311,418.

structed in accordance with my invention with portions broken away;

Fig. 2 is a fragmentary view of one of a well known type of clutch ringgenerally used in automobiles and the like and which may be made in myimproved mold;

Fig. 3 is a side elevation of a complete mold with the parts in positionfor assemage;

Fig. 4 is a sectional view of an assembled mold showing the method ofmaking a clutch ring of the type shown in Fig. 2;

ig. 5 is a similar sectional view showing the method of making a clutchring with a composition friction face at one side thereof only and witha thin metallic reinforcing member molded with and embedded with respectto the friction facing at one side thereof; Fig. 6 is a similarsectional view illustratmg the method of molding simultaneously aplurality of clutch rings of the type shown in. Fig. 5;

Fig. 7 is a like sectional view showing the method of moldingsimultaneously a plurality of clutch rings of the type shown in Fig. 1;Y

Fig. 8 is a sectional view showing a modification of the mold structurefor producing a clutch ring with interior clutch teeth;

Fig. 9 is a fragmentary view showing a portion of the mold with a clutchring therein of the type shown in Fig. 2 before the heat and compressionare applied, and illustrating the method of vulcanizing the two siderings together by means of filling plugs which are placed in holes whichare produced in the center metallic ring;

Fig. 10 is a sectional view illustrating the application of theinvention for making of disks;

Fig. 11 is a sectional view illustrating the invention for producing aplurality of disks simultaneously; and

12 is a sectional view similar t Fig. 10 illustrating the adaptabilityof the mold for making different sizes of disks.

1O, 10' indicate the top and bottom plates respectively of a moldconstructed in accordance with my invention and these plates constitutethe main elements of the mold.

The plate 10 is equipped with an upwardly projecting pin 11 in thecenter thereof which is adapted to fit into a corresponding hole 12drilled in the center of the top plate 10. In conjunction with these topand bottom plates I provide a center disk 13 which is also provided witha hole 12 adapted to receive the pin 11. 14, 15 indicate annular fillingand confining rings which are provided with pins 14, 15' respectivelyadapted to fit detachably into corresponding holes drilled to receivethem in the top and bottom plates. The mold shown in Fig. 4 has theparts thereof designed for the production one at a time of a clutch ringwith friction faces at both sides thereof. In assembling this mold thecenter disk 13 is fitted on to the center pin 11 which projects up fromthe bottom plate 10, this center disk being of a thickness correspondingto that of the completed clutch ring. In Fig. 2 C, C respectivelyindicate the friction faces of a common clutch ring with a metallic ringM interposed therebetween which is provided-with the usual projectingteeth T. The annular ring 15 is then fitted to said bottom plate and ispositioned by means of the pins 15. The composition ring C beingpreviously produced of the required size and thickness is then fittedaround the disk 13 filling the space between said disk and the annularring 15. The metallic reinforcing ring M also being produced of therequisite size is next placed in position fitting snugly around the disk13 as does the composite ring C, the teeth T projecting over the topsurface of the annular ring 15. The ring M is provided with holes H atintervals therothrough which are adapted to receive filling plugs P ofthe friction composition material as shown in Fig. 9. When heat andcompression are applied to the mold these filling plugs and thecomposition rings on each side thereof are vulcanized together to form aunitary mass with the friction rings at both sides held firmly togetherwith the metallic reinforcing ring embedded therebetween. After saidfilling plugs have been placed in said holes the second composition ringC is fitted around the center disk 13 and the, second annular ring 1 1is placed therearound resting upon the projecting teeth T. The top plate10 is then mounted on top of the whole assembly and is positioned bymeans of the center pin 11 and the pins 14 which project upwardly fromthe ring 14:. The mold is then completely assembled and ready for theapplication of heat and pressure to compress the elements of the clutchring into a unitary coherent mass as shown in Fig. 1, the frictioncomposition material being extruded and vulcanized under pressure sothat it is firmly and permanently united.

In Fig. 5 which shows the method of making one at a time clutch ringswith a friction facing C on one side thereof only and with a metallicreinforcing ring exposed at the other side thereof I employ the samemain top and bottom plates 10 and 10 but make use of a single annularring 15. A thinner center disk is used as shown at 13 The parts of themold and the clutch ring to be made therein are assembled in the samemanner as those in Fig. 4.

In Fig. 6 I show my method of building up the intermediate parts of themold for the making of a'series' of clutch rings of the type shown inFig. 5. With this object I employ spacing rings 16 to separate theadjacent clutch rings as they are built or superposed one over theother. I also employ a center disk of a thickness equal to the totalthickness of all the clutch rings contained in the mold plus the totalthickness of the spacing rings 16 separating said rings as shown at 13'.In the assemblage of the mold of this form the center disk 13 is firstplaced in position on the center pin 11 and an outer confining ring 15is positioned on the base plate 10 by the locating pins 15. The partsfor the lowermost ring to be molded including the metallic reinforcingbacking and the friction composition facing are then applied. Then oneof the spacing rings 16 is fitted thereover. Then an intermediateconfining ring 15 is applied and the parts for an intermediate ring tobe molded are put in place between the ring 15 and the center disks 13Then another spacing ring 16 is fitted thereover. It will be understoodthat this building up operation may be further continued if desired withthe further use of like parts. As shown I apply however to the topsurface of the second spacing ring 16 a confining ring 15 with locatingpins 14: to engage with the top plate 10. Then the parts for anotherring to be molded being put in place the cover plate 10 is applied andthe assemblage is then complete ready for the application of heat andpressure. It will be observed that the same top and oottom plates 10,10' are used in this operation as in the previous ones.

Fig. 7 shows the method of building up the intermediate parts of themold for the making of a series of clutch rings of the type shown inFig. 4. To this end I build the mold and the parts contained thereinprecisely as in Fig. 4: but making use of the metal spacing rings 16 toseparate adjacent clutch rings from one another. T To this end I alsomake use of a center disk equal to the total thickness of the clutchrings contained in the mold plus the thickness of the spacing ring orrings separating said clutch rings as shown at 13. In this formtheconfining rings 14, 15 are mounted and arranged in the same way withreference to the top and bottom plates as are the corresponding rings inFig. 4, while the intermediate confining rings 15 rest against oppositesides of the spacing ring 16 and engage the toothed projections of thereinforcing members of the clutch rings to be molded.

InFig. 8 I show means by which I mold a smaller clutch ring withinternal clutch teeth in the same mold by simply changing the sizes ofcenter disks and filling rings used therewith. The same top and bottomplates 10, 10 are employed but in this case I use an annular fillingring of a thickness equal to the thickness of the clutch ring or ringsto be molded as shown at 15 and the inside diameter of said filling ringbeing of course cut to conform to the outside diameter of the clutchring to be made. In this case I employ. two center disks 13 cut toconform the inside diameter of the clutch ring and placed in position sothat the inwardly protruding teeth of said clutch ring will be heldbetween them. In this case the mold and the rings held therein are builtup in the same manner as shown in the preceding views as will beobvious.

It will be noted that in my improved clutch mold I may manufacture oneor more clutch rings of any size, type or description that may berequired, the diameters and thicknesses of the clutch rings merelynecessitating the changing of the diameters and thicknesses of theintermediate filling rings, blanking rings and center disks. This it may' will be observed involves little expense as compared with the old wayof molding clutch rings wherein a complete new mold would have to bemade for each size or type of ring desired. It will also be seen that inbuilding my mold as herein described I provide a complete metalconductor for the heat to which the mold is subjected, in this mannerassuring a positive and even heat throughout the mold. lVhile I haveherein shown and illustrated my improved mold as adapted to the moldingof clutch rings with a metallic reinforce or ring embedded therein ormolded therewith it may also be used for molding rings of any size ortype either with or without a metallic reinforce, as in some cases it isrequired to produce a composition clutch ring which is afterwardintended to be riveted or attached in any suitable manner to a metallicring.

In Figs. l0, l1 and 12 I show my improved mcld arranged and adapted formolding disks such for example as phonograoh record disks, thisdispensing with the use of the center disk 13. In this application ofthe invention the top and bottom plates 10, 10 are the same as alreadydescribed and with the same centering pin 11 projecting upwardly fromthe lower plate 10'. The annular confining ring 15 as seen in Figs. 10and 12 is disposed in the same manner as already described and locatedby means of pins 15 projecting therefrom into holes therefor in thelower plate 10', this ring in Fig. 12 being shown as wider, 2". (2.,extending in farther toward the center than in Fig. 10 to provide formolding a smaller disk D when the mold is set up in Fig. 12 than as seenat D in Fig. 10. The mold space thus formed permits the production ofdisks with a center hole as provided by the centering pin 11, being thussuitable for producing ordinary disk phonograph records or the like. Forthe production of disks or rings with a center hole therein larger thanprovided by the center pin 11 it will be understood that center fillingdisks corresponding to the disk 13 as already described may be employedbut of selectively smaller dimension. Fig. 11 illustrates theapplication of the invention for molding simultaneously a seriesof disksD with a center hole therein. The mold for this purpose is built up in away corresponding to that already described in connection with Figs. 6and 7, the spacing disks 16 corresponding to the spacing rings 16already described and the intermediate confining rings l5 beingsubstantially the same as the correspondingly designated rings in Fig.6. I am aware that the invention may be embodied in other specific formswithout departing from the spirit or essential attributes thereof, and Itherefore desire the present embodiment to be considered in all respectsas illustrative and not restrictive, reference being had to the appendedclaims rather than to the foregoing description to indicate the scope ofthe invention.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A mold, comprising top and bottom plates with a centering memberextending from one thereof and fitted into the other thereof, a centerfilling member between said top and bottom members engaged with saidcentering member, and a peripheral ring confining member engaged withone of said plates to be held in position thereby.

2. A mold, comprising spaced apart plates equipped with means forholding them in relative alinement, and means determining the outline ofa ring to be molded fitted between said plates and detachably engagedtherewith to be held from displacement with respect thereto.

3. A mold, comprising spaced apart plates equipped with a centering pinextending from one thereof into engagement with the other thereof, andmeans serving as a spacing element fitted between said plates anddetachably engaged with one thereof serving to determine the peripheraloutline and dimension of a ring or disk to be molded.

4. A mold, comprising spaced apart plates equipped with a centering pinexsaid plates respectively and adapted to retending from one thereofinto the other ceive between them projecting teeth of a thereof, acenter filling disk engaged with clutch ring or the like.

said pin and filling the space between the In testimony whereof, I havesigned my 10 5 central portion of said plates, and periphname to thisspecification.

eral ring members detachably engaged with WILLIAM T. BONNER.

